/*
 * [The "BSD licence"]
 * Copyright (c) 2012 Dandelion
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 3. Neither the name of Dandelion nor the names of its contributors 
 * may be used to endorse or promote products derived from this software 
 * without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.github.dandelion.datatables.core.callback;

import static com.github.dandelion.datatables.core.util.JavascriptUtils.INDENT;
import static com.github.dandelion.datatables.core.util.JavascriptUtils.NEWLINE;

import java.util.List;

import com.github.dandelion.datatables.core.asset.JavascriptFunction;

/**
 * <p>
 * Callback called by DataTables.
 * <p>
 * A callback is composed of:
 * <ul>
 * <li>a {@link CallbackType} available among all callbacks proposed by
 * DataTables</li>
 * <li>a {@link JavascriptFunction} that is executed in the callback</li>
 * </ul>
 * 
 * @see CallbackType
 * 
 * @author Thibault Duchateau
 * @since 0.8.9
 */
public class Callback {

	private CallbackType type;
	private JavascriptFunction function;

	public Callback(CallbackType type, String functionContent) {
		this.type = type;
		this.function = new JavascriptFunction(functionContent, this.type.getArgs());
	}

	public Callback(CallbackType type, JavascriptFunction function) {
		this.type = type;
		this.function = function;
	}

	public CallbackType getType() {
		return type;
	}

	public void setType(CallbackType type) {
		this.type = type;
	}

	public JavascriptFunction getFunction() {
		return function;
	}

	public void setFunction(JavascriptFunction function) {
		this.function = function;
	}

	public void appendCode(String code) {
		this.function.appendCode(NEWLINE);
		this.function.appendCode(INDENT);
		this.function.appendCode(INDENT);
		this.function.appendCode(code);
	}

	public static boolean hasCallback(CallbackType callbackType, List<Callback> callbacks) {
		if (callbacks != null) {
			for (Callback callback : callbacks) {
				if (callback.getType().equals(callbackType)) {
					return true;
				}
			}
		}
		return false;
	}

	public static Callback findByType(CallbackType type, List<Callback> callbacks) {
		for (Callback callback : callbacks) {
			if (callback.getType().equals(type)) {
				return callback;
			}
		}
		return null;
	}

	@Override
	public String toString() {
		return "Callback [type=" + type + ", function=" + function + "]";
	}
}